Antislip device.



W. M. STEVENSON.

ANTISLIP DEVICE. APPLICATION FILED PEB.7,1908.

9%8 456a Patented June 1, 1909.

' 2 SHEETSSHEET 1.

W/7'NESSES IE E INVENTOH 71 6 W 4. By

A TTOHNEYS W. M. STEVENSON.

ANTISLIP DEVICE.

APPLICATION FILED PEB.7,1908.

Patented June 1, 1909.

2 SHEETS-SHEET 2.

W/ TNE SSE S A TTORNE Y S WILLIAM M. STEVENSON, or INDIAN ORCHARD, MASSACHUSETTS.

ANTISLIP DEvicE.

To all whom it may concern:

Be it known that I, WILLIAMM. STEVEN- SON, a citizen of the United States of America, residing at Indian have invented a new and useful Antislip Device, of which the following is a specification.

My invention relates to improvements in.

devices designed to be attached to the tires of power-driven road-vehicle wheels to cause such'wheels to track firmly and evenly and to prevent them from sliding, slipping or skidding, and consists of an arch with a com paratively soft tread which is either curved or straight longitudinally and has scalloped, indented or serrated edges and may be perforated, all as hereinafter set forth.

- Heretofore anti-slip devices of various kinds have been produced which were made of metal in some form with the result that, however much or little value they may possess as gripping mediums, they tear up and wear out the'roads to such an extent that their use has been prohibited even, in some localities; furthermore, such ously injure the tires; and the primary object of my invention is to produce a tiregrip which, while possessing practically all of the advantages of metallic devices for a similar purpose, do not destroy or even seriously injure the road-bed, and do not in jure the the.

A further object is to provide a device of this kind which iscapable of being secured firmly to a tire, and one which can be so attached readilyand as readily detached from the tire.

I attain these objects by the means illustrated in the, accompanying drawings, in which Figure his a perspective view of one form of my invention; Fig. 2, a perspective view of a slightly modified form of said invention; .Fig. 3, a plan view of the grip shown in the first view as it would appear if flattened, one end being removed; Fig. 4, an edge view of a grip having a straight tread longitudinally; Fig. 5, a side view of the grip shown in the preceding view, and, Fig. 6, a perspective view of a one-piece grip.

Similar figures refer. to similar parts throughout the several views.

The form of my grip shown-in the first three views comprises in its inception a strip 1 of frictioned fabric for 2 of rubber for a facing,

devices seri- 7 Specification of Letters Patent.

Application filed February 7, 1908.

united and formed into I shoe variety the tread Patented .Time 1, 1909.

Serial No. 414,759.

an arch of thehorse portion of which is @generally thicker than the side portions;

Orchard, in the county -.of Hampden and State of Massachusetts,

- openings 44 in the ends a backing and a strip f the two strips being This arch is so proportioned that it is adapted to fit over the tire on a wheel and to be. secured thereto in any suitable manner, as by means of cables 3' 3 passing throu h or legs of said are and turn-buckles (not shown), the cables extending around the wheel on both sides in the usual manner. Two openings 5 are provided in each leg of said arch, at right-angles to and outside of the openin 4 therein, to receive chains 6 by means of whieh thearclfes are spaced apart, it being understood, of course, that a luralit of arches is used with each wheel. n' the a sence of some suitable spacing means as the chains 6, o'r in the event that the arches were fastened in plate with straps passed inside of the wheel rim' the well-known manner, as might be done,

mg to the shape of the grip or arch and to the length of the sides thereof it will embraee' more than half of thatport'ion of the tirejto which it is applied, or, to state it differently, .the circumference of either of the cables' 3 is less than that of a tire-, to which a set of gripe is fastened bysa'id cables, at cen}: ter, so that it is possible to attach the grip to the tire in a ver T firm and seoure mafliier. This soft grip, that is, soft incOinP'aIiSC to n'ietallic rips, has been found to afford a very satisfactory antislip device, even without the additional features" desoribed below.

In Figs; 4 and 5 the outer or tread'portion .of the grip is re resented at as balm built out so as to pro ucea'straight treadlbn itudiiially, which will be crosswise of tlieti e to which such grip is advantage because of the larger trackage surface, the angles at the ends of such surface as well as at the sides, and the greater wearing qualities. This straight tread 7 may be longer or shorter as desired. In these Views there are shown, also, leather tabs 8-8 in place of the combined rubber and fabric for the lower terminals of the legs of the arch, which are to be used as fastening or attaching mediums. These tabs terminals of the combined rubber and fabric portion by meansofrivets or in any other suitable manner to complete the arch. A saving in rubber is effected by employing the tabs at the ends in the manner ust explained, hence there is a saving in expense.

l p 'wliiell is bf meek.

are secured to the I Similar tabs may be employed to advanta e sented as being narrower than the intermeare adjacent to the endnotches, may

in connection with the grips illustratedi n Figs. 1 and 2. I

Generally speaking the more exposed angles, sharp edges, or corners there are in a dediate ortions of the two grips, while each of the ot ier grips is of the same width throughout, but it is to be understood that this matter of width is unimportant so far as my invice of this kind, rovided they are. not so vention isconcerned, and that in some cases numerous as to wea en the device, the better I the grips herem shown as being of the same the device will grip the road-bed, therefore I prefer to rovide my arch or the tread thereof with ad itional angular portions besides those naturally afforded along both longitudinal or lateral edges of the two styles of treads shown and at the ends also of the straight tread 7. Such additional gripping portions are secured either by cutting into the lateral edges of the tread of the arch, or by perforating such tread, or both.-' The sha e, number and size of the cut portions an of the perforations will vary necessarily in order to meet difierent conditions or requirements, but V-shaped notches 9 in the edges of the rubber facing 2, which may or may not extend through the edges of the fabric backing 1, and substantially round holes 10 through the center of the tread in the spaces marked off by each set of four of such notches, are believed to be well adapted for the ur"- ose. The notches 9 are V-shaped longltu inally and in cross-section, and such notches in Flgs. 1 and 3 and the two middle ones in Fig. 4 in part extend through the backing 1, while said notches in Fig. 2 and the two outer ones in Fig. 4 are formed in the facing 2 only and do not extend into said backing. The outer portions of the ends of the arts or tongues 11 of a grip between the note es 9, and of the parts of such grip whigh e charnfered in'any case, as shown at 12 in Figs. 1 and 3, or not, as seems best. The device which appears in the last view is similar to that shown in the first view exce ting that it is a one-piece grip made of leat er or other suitable material instead of being constructed out of fabric and rubber. The notches 9 in the leather or one-piece grip may be like those in theFig. 2 grip just as well.

and the ends of the one-piece grip are repre- The tabs 8 on the straight-tread grip width throughout will be made like those herein shown which vary in width, and vice versa.

As will ap ear evident from the foregoing, I do not wlsii to be restricted to any specific construction so far as size, shape and minor details are concerned.

What I claim as my invention, and desire to'secure by Letters Patent, is'

1. A comparatively soft or yielding grip, of the class described, consisting of an arch adapted to fit over a tire and having a tread with serrated edges, said tread having a plain portion between the edge serrations which is continuous.

2. A comparatively soft or yielding grip, of the class described, I consisting of an arch adapted to fit over a tire and having a tread with serrated and chamfered' edges, said tread having a plain' ortion between said serrated and chamfere edges which is continuous.

3. A comparatively soft or yielding grip, of the class described, consisting of .an arc adaptedto fit over a tire and having a perfohso rated tread with serrated edges, said tread having a plain portion between said serrated edges an around the perforations in the tread which is continuous. I

4. Acorn aratively soft or yielding'grip,'of the class escribed, consisting of an arch adapted to fit over a tire and having aperfo rated tread with serrated and chamfered edges, said tread having a plain ortion between said serrated and cham ered edges and around the perforations in the tread which is continuous.

\VlLLIAM M. STEVENSON.

Witnessesz- AprRED G. FAIRBANKS, F. A. CUTTER. 

